Hermann haedicke



(No Model.)

H. HAEDIGKE.

COMBINED GAS AND STEAM MOTOR ENGINE. No. 433,563. Patentd Aug. 5-, 1890.

f, a feed-pump,

UNITED STATES 1 PATENT OFFIcE.

.HERMANN HAEDIGKE, OF RFIMSCHEID GERMANY.

COMBINED GAS AND STEAM MOTOR ENGINE.

SPECIFICATION forming part of Letters Patent NO. 433,563, dated August 5, 1890. Application filed November 18, 1889. Serial No. 330,710. (No model.)

T0 aZZ whom it may concern:

Be itknown that I, HERMANN HAEDIOKE, engineer and director of the Technical Col logo for Iron and Steel l\ilanufactures,in Remscheid, a resident of the city of Remscheid, in the Kingdom of Prussia and German Empire, and a subject of the King of Prussia and German Emperor, have invented a new and use ful Combined Gas and Steam Motor Engine; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an. improved construction of motor-engine worked by combustible gas and steam combined, which I will proceed to describe with reference to the accompanyin g drawings, which show, by way of example, a construction of engine embodying my improvements, and in which- I Figure 1 shows a plan of the engine; Fig. 2, a longitudinal section through the steam generator and digeste'r; and Fig. 3 shows a vertical section of the feed-water heater.

In the figures, 1 is the digester; 2 and a, a boiler; 3 and e, a compressor; 3, a pipe connecting cl, 3 and e, and f; 3 a slide-valve, and 3 an air-aperture on the pipe connecting both ends of 3 and c; 4, an accumulator; 4., a pipe connecting 4 and 5 and b; 5 and b, a small cylinder; (5 and c, a large cylinder; 7

and g, a feedwater heater; 8, an exhaust; (Z,-

a condenser; d, a pipe connecting (Z and f;

and h a feed-valve.

The engine is constructed with two cylinders working according to the compound system and having their cranks placed at ninety degrees to each other. Steam enters the small cylinder on one side of the piston, on the other side of which the gases work, as will be afterward explained. The steam and gases expand fully in the large cylinder. The engine therefore is a compound one, both for steam and gases. It might also be worked by each fluid alone. The gases which I employ are those generated in an ordinary gas producer or digester 1, Fig. 2, charged with a suitable combustible matter for the production of carbonic oxide with or without hydrogen-that is to say, with" or without the introduction of water or steam. This gas is first introduced into a steanrgenerator 2 and a, where it is cooled down, producing steam. This generator is an ordinary steam-boiler of any suitable construction, but arranged so that when desired the fire can be removed and the furnace and ash-pit, as also the chimney, be hermetically closed. In Fig. 2 these parts are shown open; but in the plan, Fig. 1, they are supposed to be closed. hen they are open, as at Fig. 2, the steam-boiler acts in the usual manner for producing steam for working the engine, a fire being lighted in the furnace. hen the fire is removed and the said openings are closed, it is in condition for normal working-receiving the hot gases from the producer. After being cooled by giving up their heat to the boiler the gases pass to the compressingpump 3 and e, as indicated by the arrows, a suitable proportion of air being in troduced through the air-valve attached to the inlet-pipe so as to form an explosive mixture. This compressing-pump is cooled by a refrigerating-current, and the temperature is regulated at will by passing either exhauststeam or water of condensation through the pipe 3, Fig. 1, or by using cold water. The compressor drives the gas into an accumulator at, of sufficient capacity, which serves to supply the engine automatically. From the accumulator the gas passes to the end of the small cylinder 5, in which itisto work-namely, the right-hand end, as shown on the drawing. The charge can be ignited by'a flame or bya heated tube, or, by preference, by an electric spark. This explosion may take place either in the cylinder at determined intervals of time or in the slidecasing, or, by preference, at a suitable point between the compressor and the slide casing. In the latter case it is not to produce the explosion at a precise moment.

.The accumulator is then filled with gaseous products-of combustion under pressure, and the cylinder then Works simply with gas under pressure on the one side and with steam on the other side. This mode of working consequently requires no alteration in con struction, and the expansions are effected in the usual manner in the large cylinder 6.

On passin from the large cylinder the expanded gas is led through a tubular feed Water heater 7 and g, (shown in section at Fig. 3,) and finally escapes through a pipe 8.

The feed-water passes through this apparatus in the contrary direction, and this becomes highly heated before being forced into the steam-boiler 2 and a. The steam passes from the boiler to the end of the small cylinder in which it has to work. (The left-hand end on the drawing.) It then expands in the corresponding end of the large cylinder, and then escapes either into the air, or, preferably, into a condenser d. The water of condensation is led thence to the feed-water heater through the pipes 61', passing, if desired, round the compressor 3 and e, and is then forced into the boiler 2 and a.

Briefly repeated, the course of the gases and steam is as follows: The gases generated in the digester l, passing through the boiler 2 and a, are acted upon by the compressor 3 and e and driven into the accumulator 4. Escaping from the latter they enter one after the other into the small cylinder 5 and b and the large cylinder 6 and 0. Finally, they pass through the feed-water heater 7 and g to the exhaust 8.

The course of the steam generated by the boiler 2 and a is as follows: Having worked in the cylinders 3 and band 6 and cit escapes into the condenser d. The feed-water is driven by the feed-pump f to the feed-water heater 7 and g, re-entering into the boiler 2 and a. On its way from the condenser cl to the feed-pump f it may be used to cool the compressor 3 and e.

The construction of engine which I have described, and shown on the drawings, permits of very varied conditions of working. Thus, while leaving the action of the steam unaltered, the action of the gas can be modified in various ways without having to modify the construction of the engine.

What I claim is.

1. The combination, with an engine'cylinder, of a boiler for supplying one end of said cylinder with steam,a digester attached to said boiler for producinghot inflammable gas and passing said hot gas over the heating-surfaces of said boiler, and devices, substantially as described, for mixing air with said gas after it leaves the boiler and compressing the mixture, whereby said mixture whensubsequently ignited may be caused to develop power in the other end of the said cylinder, substantially as set forth.

2. The combination, with anengine-cylinder, of a boiler for supplying one end of said cylinder with steam, a compressor adapted to supply a compressed inflammable mixture of gas and air to the other end of said cylinder, a feed-water heater heated by the products of combustion exhausted from the gas end of said cylinder, a condenser for converting the exhaust-steam into water, and a feed-pump for forcing the water through the said heater into the boiler, substantially as and for the purposeset forth.

3. The combination, with a stean1-boiler,a compound engine having one end of its highpressure cylinder connected to said boiler, an exhaust-steam condenser, and a feed-pump for returning the condensed Water to said boiler, of a compressor for forcing a compressed inflammable mixture of gas and air into the other end of the high-pressure cylinder of said engine, and a heater intermedi-' ate between the said feed-pump and boiler and heated by the expanded products of combustion exhausted from the gas end of the lowpressure cylinder of said engine, substantially as and for the purpose set forth.

In testimony whereof I affix my signature in Witnesses:

GUsTAvETOELRIoHs, W. D. WARNER. 

